<template>
  <div class="dndList">
    <div :style="{ width: width1 }" class="dndList-list">
      <h3>{{ list1Title }}</h3>
      <draggable
        :set-data="setData"
        :list="list1"
        group="article"
        class="dragArea"
      >
        <div
          v-for="element in list1"
          :key="element.id"
          class="list-complete-item"
        >
          <div class="list-complete-item-handle">
            {{ element.id }}[{{ element.author }}] {{ element.title }}
          </div>
          <div style="position: absolute; right: 0px">
            <span
              style="float: right; margin-top: -20px; margin-right: 5px"
              @click="deleteEle(element)"
            >
              <i style="color: #ff4949" class="el-icon-delete" />
            </span>
          </div>
        </div>
      </draggable>
    </div>
    <div :style="{ width: width2 }" class="dndList-list">
      <h3>{{ list2Title }}</h3>
      <draggable :list="list2" group="article" class="dragArea">
        <div
          v-for="element in list2"
          :key="element.id"
          class="list-complete-item"
        >
          <div class="list-complete-item-handle2" @click="pushEle(element)">
            {{ element.id }} [{{ element.author }}] {{ element.title }}
          </div>
        </div>
      </draggable>
    </div>
  </div>
</template>

<script setup name="DndList">
import draggable from 'vuedraggable'
const props = defineProps({
  list1: {
    type: Array,
    default() {
      return []
    },
  },
  list2: {
    type: Array,
    default() {
      return []
    },
  },
  list1Title: {
    type: String,
    default: 'list1',
  },
  list2Title: {
    type: String,
    default: 'list2',
  },
  width1: {
    type: String,
    default: '48%',
  },
  width2: {
    type: String,
    default: '48%',
  },
})
function isNotInList1(v) {
  return props.list1.every((k) => v.id !== k.id)
}
function isNotInList2(v) {
  return props.list2.every((k) => v.id !== k.id)
}
function deleteEle(ele) {
  for (const item of props.list1) {
    if (item.id === ele.id) {
      const index = props.list1.indexOf(item)
      props.list1.splice(index, 1)
      break
    }
  }
  if (isNotInList2(ele)) {
    props.list2.unshift(ele)
  }
}
function pushEle(ele) {
  for (const item of props.list2) {
    if (item.id === ele.id) {
      const index = props.list2.indexOf(item)
      props.list2.splice(index, 1)
      break
    }
  }
  if (isNotInList1(ele)) {
    props.list1.push(ele)
  }
}
function setData(dataTransfer) {
  // to avoid Firefox bug
  // Detail see : https://github.com/RubaXa/Sortable/issues/1012
  dataTransfer.setData('Text', '')
}
</script>

<style lang="scss" scoped>
.dndList {
  background: #fff;
  padding-bottom: 40px;
  &:after {
    content: '';
    display: table;
    clear: both;
  }
  .dndList-list {
    float: left;
    padding-bottom: 30px;
    &:first-of-type {
      margin-right: 2%;
    }
    .dragArea {
      margin-top: 15px;
      min-height: 50px;
      padding-bottom: 30px;
    }
  }
}

.list-complete-item {
  cursor: pointer;
  position: relative;
  font-size: 14px;
  padding: 5px 12px;
  margin-top: 4px;
  border: 1px solid #bfcbd9;
  transition: all 1s;
}

.list-complete-item-handle {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  margin-right: 50px;
}

.list-complete-item-handle2 {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  margin-right: 20px;
}

.list-complete-item.sortable-chosen {
  background: #4ab7bd;
}

.list-complete-item.sortable-ghost {
  background: #30b08f;
}

.list-complete-enter,
.list-complete-leave-active {
  opacity: 0;
}
</style>
